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#1
04-17-2008, 02:19 PM
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Engine Running Very Rough
I came out this morning to go to the doctors office. When I started the car it started right up but it began running rough. The idle will drop and rise sporadically. I think it's running rich as it stinks of what I would say is fuel while it's running. Also, it does not throw a CEL.
All that has changed recently was that I took off the BCS to pull the plug and broke it. I got another one and put it back on. That was yesterday and it ran fine after I put the new BCS in. I also cleaned the MAS this weekend. So, I can only suspect a few things right now, but I'm not sure. Please tell me you guys know what's up. 
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#2
04-17-2008, 04:39 PM
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Re: Engine Running Very Rough
that seems really similar to what my car did when my ECU took a dump
__________________
'93 3000gt VR-4
170k, 27k on JDM motor MBC @ 14.5 psi Datalogger Intake T-Pros Downpipe Gutted Pre Cats Mods to come: Upgraded Fuel System and 75 shot of Nitrous, Full Exhaust and hopefully 15Gs Audio Sony Deck Eclipse 6x8 2 ways in the back Clarion Kevlar cone Component System in the front 2 Alpine Type S 10 inch DVc Subs 1 Audiobahn 10 inch DVC D Jones Series One 800 Watt Jensen amp and a soundstream 300 watt 4 ch to the speakers And still under 4000 lbs w/ me in the car 
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#3
04-17-2008, 05:58 PM
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Re: Engine Running Very Rough
Yes, check the caps in your ecu as well as the honey combs in your maf sensor.
__________________
94 Dodge Stealth TT 94 Dodge Stealth TT, pearl yellow, for sale 93 3000GT VR4, stock, for sale, red 96 3000GT Spyder SL, black, stock, might sell 97 3000GT VR4: stock, for sale, red 92 Galant VR4: TBE, bunch of crap 95 Montero SR: run stuff over vehicle
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#5
04-17-2008, 06:29 PM
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Re: Engine Running Very Rough
Pull off the side carpet panels on the center console. You will see the ecu behind the radio. 3 10mm bolts hold it in and 3 plugs go into the ecu. Undo that stuff and pull it out. 4 screws to take off the ecu cover and you are now looking at the circuit board. Check around the 3-4 capacitors that are on the board to see if they are leaking anything.
__________________
94 Dodge Stealth TT 94 Dodge Stealth TT, pearl yellow, for sale 93 3000GT VR4, stock, for sale, red 96 3000GT Spyder SL, black, stock, might sell 97 3000GT VR4: stock, for sale, red 92 Galant VR4: TBE, bunch of crap 95 Montero SR: run stuff over vehicle
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#6
04-17-2008, 06:41 PM
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Re: Engine Running Very Rough
Hey polly.. just come over and swap them out and see what fixes it..
Jason
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Add me on Facebook!! Add Me on Myspace!! I am on Twitter.com too!! add me as a freind on Digg!! check out CCOTM!
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#7
04-17-2008, 06:50 PM
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Re: Engine Running Very Rough
Only problem is that I just went out to pull the ECU and I can't bend over that much to get it out since they cut me open again yesterday at the doctor's office.
 Not to mention that I wouldn't want to drive it the way it is running. I barely made it to Orem yesterday on the epoxied boost solenoid. Now, wouldn't I at least get a CEL if the ECU decided to bust a cap, no pun intended.
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#10
04-21-2008, 11:17 PM
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Re: Engine Running Very Rough
Well, I got another MAS and put it in. The car started right up and idled like normal. However, I was getting a lot of white smoke and it stunk like sulfur. So, I'm wondering if from running rich I had some fuel in one of the cats. After the engine warmed up it stopped? Also, there was a noise, sounded like metal rattling around near the passenger wheel that also went away once the engine warmed up.
Despite that it is idling better than before.
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